http://www.nytimes.com/2010/03/06/opinion/06Tonelson.html?ref=opinion<snip>
Productivity measures how many worker hours are needed for a given unit of output during a given time period; when hours fall relative to output, labor productivity increases. In 2009, the data show, Americans needed 40 percent fewer hours to produce the same unit of output as in 1980.
But there’s a problem: labor productivity figures, which are calculated by the Labor Department, count only worker hours in America, even though American-owned factories and labs have been steadily transplanted overseas, and foreign workers have contributed significantly to the final products counted in productivity measures.
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The result is an apparent drop in the number of worker hours required to produce goods — and thus increased productivity. But actually, the total number of worker hours does not necessarily change.
This oversight is no secret: as Labor Department officials acknowledged at a 2004 conference, their statistical methods deem any reduction in the work that goes into creating a specific unit of output, whatever the cause, to be a productivity gain.
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Above all, if offshoring has been driving much of our supposed productivity gains, then the case for complete free trade begins to erode. If often such policies simply increase corporate profits at the expense of American workers, with no gains in true productivity, then they don’t necessarily strengthen the national economy.
In this regard, the case for free trade as a stimulus for innovation weakens, too. Because productivity gains in part reflect job offshoring, not just the benefits of technology or better business practices, then the American economy has been much less innovative than widely assumed.
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